Anatomy Memorization pt 2 Flashcards Preview

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Flashcards in Anatomy Memorization pt 2 Deck (21)
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1

Intrinsic Laryngeal muscles innervation and exception

Supplied by recurrent laryngeal nerve except cricothyoroid = external laryngeal nerve (branch of superior laryngeal nerve)

2

Cricotyhroid Muscle

Action
Innervation

Stretches and tenses vocal fold

External Laryngeal Nerve

3

Posterior Cricoarytenoid

Action
Innervation

Abducts vocal fold

Recurrent laryngeal Nerve

4

Lateral cricoarytenoid

Action
Innervation

Adducts vocal fold

Recurrent laryngeal Nerve

5

Thyroarytenoid

Action
Innervation

Relaxes vocal fold

Recurrent Laryngeal Nerve

6

Transverse and oblique arytenoids

Action
Innervation

Closes rima glottides

Recurrent Laryngeal Nerve

7

Vocalis

Relaxes posterior vocal ligament, tenses anterior vocal ligament - Antagonist of cricothyroid muscle

Recurrent laryngeal nerve

8

Recurrent Laryngeal Nerve

Left = Wraps around aortic arch (ligamentum arteriosum)
Right = Wraps around right subclavian

Motor to all intrinsic muscles of larynx (via inferior laryngeal branch) except cricothyroid

Sensory = laryngeal mucosa below vocal folds and upper trachea

9

Superior Laryngeal Nerve

Branch of vagus right after exit from jugular foramen

Passes through thyrohyoid membrane

External branch = Innervates cricothyroid

Internal branch sensory info to laryngeal mucosa above vocal folds

10

Contents of Axilla

Axillary Vessels

Brachial Plexus

Biceps Brachii (both heads)

Coracobrachialis

11

Axillary Artery

After lateral border of first rib (continuation of subclavian)

Close to medial cord of brachial plexus

Posterior to pec minor muscle

Becomes brachial artery after passing inferior border of teres major

12

Median Nerve (Brachial Plexus)

Lateral and medial cords
C5-T1

Motor = Forearm flexors

Sensory = Anterior arm, lateral palm

13

Ulnar Nerve (Brachial Plexus)

Medial Cord
C8-T1

Flexors of wrist and fingers = Motor

Sensory = Medial arm/forearm, medial palm

14

Radial Nerve (Brachial Plexus)

Posterior Cord
C6-C8

Extensors of arms/forearm = motor

Sensory = posterior arm, forearm hand

15

Musculocutaneous Nerve (Brachial Plexus)

C5-C7

Motor = Arm flexors (Biceps, coracobrachialis, brachialis)

Sensory = Anterolateral arm, forarm

16

A-alpha nerve fiber

Fastest and biggest

Proprioception and Motor

17

A-Beta nerve fiber

2nd Fastest and 2nd Biggest

Sensory, Touch, Pressure

18

A-gamma Nerve Fiber

3rd fastest and 3rd Biggest

Muscle Spindles

19

A-sigma nerve fiber

4th Fastest and 4th Biggest

Sharp Pain, temperature, touch

20

B-fiber nerve fiber

5th Fastest and 5th Biggest

Preganglionic autonomic

21

C-Fiber Nerve Fiber

Slowest

Dull pain, temperature, postganglionic autonomic

Only non-myelinated